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Simon Willison

Building a multiplayer game world with autonomous Fable-class models

Read the original on Simon Willison →

The article describes how Jacob Sansbury’s team built a massively multiplayer game called Spawn, where players can prompt an in‑game AI agent, Savi, to modify the world—creating castles, dragons, and more. The development process is fully autonomous, with Fable‑powered agents that read errors, bug reports, and metrics, then directly modify live code and ship changes to production every hour. The system treats any hour without a ship as a severe incident, enabling rapid rollbacks and continuous deployment at a scale that costs over $3 million in AI tokens monthly.

Machine-generated by The Flow from the publisher's headline and feed description — not written or checked by a human. The full article lives at Simon Willison.

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